class Cb {
	public static void main(String[] args) {
		int a,b;
		a = b= 20;
		boolean bo1 =(++a % 3 == 0 )&&(a++ % 7 == 0);
		System.out.println("a =" + a + ",bo1 = " + bo1);



		boolean bo2 =(b++ % 3 == 0 )&& (++b % 7 == 0);
		System.out.println("b =" + b + ",bo2 = " + bo2);
	
}
}